EP0736261B1 - Procédé de fabrication de chips de pomme de terre, en deux étapes - Google Patents

Procédé de fabrication de chips de pomme de terre, en deux étapes Download PDF

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Publication number
EP0736261B1
EP0736261B1 EP96200848A EP96200848A EP0736261B1 EP 0736261 B1 EP0736261 B1 EP 0736261B1 EP 96200848 A EP96200848 A EP 96200848A EP 96200848 A EP96200848 A EP 96200848A EP 0736261 B1 EP0736261 B1 EP 0736261B1
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EP
European Patent Office
Prior art keywords
potato
range
slices
potato slices
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP96200848A
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German (de)
English (en)
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EP0736261A2 (fr
EP0736261A3 (fr
Inventor
Pravin M. Desai
Jennifer B. Raymond
Michael L. Pfeiffer
Mary M. Pohlmeier
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Frito Lay North America Inc
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Recot Inc
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Publication of EP0736261A3 publication Critical patent/EP0736261A3/fr
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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L19/00—Products from fruits or vegetables; Preparation or treatment thereof
    • A23L19/10—Products from fruits or vegetables; Preparation or treatment thereof of tuberous or like starch containing root crops
    • A23L19/12—Products from fruits or vegetables; Preparation or treatment thereof of tuberous or like starch containing root crops of potatoes
    • A23L19/18—Roasted or fried products, e.g. snacks or chips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S426/00—Food or edible material: processes, compositions, and products
    • Y10S426/808—Starch base snack product

Definitions

  • the present invention relates to a process for manufacturing potato chips.
  • potato chips are generally produced in a one-step frying process by frying slices (approximately 80% moisture) to a moisture content of less than 2%.
  • the frying process can be continuous or batch. For a commercial process carried out at a number of locations, this involves transporting raw potatoes, sometimes over long distances, from the locations where they are grown to the sites where the potato chips are made.
  • a number of processing steps are involved and they are: potato storage, potato washing, peeling, paring and trimming, slicing, washing, and frying to a specific finished product moisture.
  • the potato chips are then salted and bagged and delivered to commercial locations for sale.
  • all of the processing steps are basically duplicated to produce commercially available potato chips.
  • the present invention overcomes the disadvantages of the prior art by providing a continuous process for preparing potato chips for storage until ready for final frying, the process comprising the steps of slicing peeled tomatoes into slices with a thickness in the range of 1.3 to 2.8 mm, washing said potato slices to remove surface starch therefrom, partially dehydrating said washed potato slices by frying said potato slices for a time period until the moisture content is reduced to a range of 3% to 30% or alternatively deactivating enzymes and drying said potato slices with heated air for a time period until the slices have a moisture content in the range of 25% to 74%, freezing said potato slices, and storing said potato slices until ready for final frying and bagging.
  • the potato slices may be flat, ruffled, ridged, or rippled, crosscut, or the like. As needed, the frozen slices are transported to the sites where the potato chips are finish fried continuously.
  • the first stage is a continuous process for preparing the potato slices for indefinite storage. This stage is carried out at a site near the source of potatoes.
  • the second stage is also a continuous process for preparing potato chips for commercial use at any one of the plurality of locations.
  • the frozen potato slices are finished fried, salted and packed for commercial use.
  • FR-A-1.445.622 discloses such a process according the preamble of claim 1, wherein potato slices are partially fried in the first stage.
  • GB-A-1 506 166 discloses such a process according the preamble of claim 14, wherein potato pieces are partially dried by heated air in the first stage.
  • U.S. Pat. No. 3,050,404 discloses a method for preparing frozen french fry potatoes.
  • the frozen potatoes have a high moisture content between about 41% and 54%.
  • the potatoes are cut into french fry strips, the strips are washed after cutting to remove free starch and then are immersed in cooking fat, having a temperature of approximately 149 °C (300 °F).
  • the strips are held in the fat for the amount of time necessary to decrease their moisture content to a level between 41% and 54%. They are then taken from the fat, drained to allow any excess fat to run off, cooled to room temperature, placed in a moisture-proof package, and then frozen.
  • the strips can be held in a frozen state indefinitely for frying at a later time.
  • U.S. Pat. No. 5,279,840 discloses a method of making reduced fat deep-fried potatoes.
  • the method includes coating the potato slices with a mixture of ungelatinized amylose and calcium, then blanching partially drying to obtain only about a 5 to 30% total weight loss, parfrying, freezing, and finish frying the slices.
  • the partially dried pieces are parfried for "from about 15 to 60 seconds at a temperature of about 149 °C (300 °F) to about 190 °C (375 °F)" and then frozen thereafter.
  • U.S. Pat. No. 4,590,080 discloses a process for preparing parfried and frozen french fries. Potato strips are blanched, parfried, blast frozen, parfried again, and frozen again. The twice parfried and frozen potatoes all had a moisture content of greater than 43%.
  • U.S. Pat. No. 4,194,016 discloses a process for preparing precooked fruits and vegetables.
  • the specification teaches that potatoes may be peeled, cut, cooked in water or steamed, heated in dry air "such that no part of the potato tissue is lower than 68% moisture", chilled, thin-sliced, frozen, and then fried in oil.
  • U.S. Pat No. 3,649,305 discloses a process for preparing frozen french fry potato segments. Potato strips are dehydrated to lose about 10 to 30%, preferably 20%, of their original weight, blanched, parfried, and frozen. Parfrying is carried out for about 30 to 90 seconds in oil at about 149 °C to about 205 °C (about 300 °F to 400 °F).
  • U.S. Pat No. 3,397,993 discloses a process for preparing frozen french fry potatoes. Potato strips are blanched, dehydrated by heated air to about 70-80% of their initial weight, partially fried, and then frozen. A potato strip dried to 70% of its original weight would still contain at least about 50-55% moisture. Following dehydration, "the partially dehydrated strips are immersed in a deep fat fryer for a short period of time, for example from about 15 to about 60 seconds at a fat temperature of from about 149 °C to about 190 °C (about 300 °F to about 375 °F) during which time the moisture content is still further reduced and during which time the strips are partially fried. The strips are then frozen.”
  • U.S. Pat No. 3,050,404 discloses a method for preparing a frozen partially cooked french fry potato product.
  • the method comprises parfrying the potato pieces until the moisture content is between 41% and 54%.
  • the patentee states that, "It is not practical to cook to a moisture content level substantially less than 41% since the product, in subsequent finishing, is apt to become excessively firm.”
  • the specification teaches that the frozen potato strips can be held frozen indefinitely after which cooking is completed by the consumer.
  • U.S. Pat. No. 2,983,619 discloses a method of preparing preserved potato products. The method is directed to the preparation of "either small whole potatoes, balls, or cut pieces such as cubes, sticks, slices" and so forth. Thin slices as for potato chips, are not specifically disclosed. Potato pieces are partially cooked, and partially dried to a moisture content of 40-68%. The specification teaches that no part of the potato should have more than 68% or less than 40% moisture prior to freezing.
  • U.S. Pat. No. 2,597,066 discloses a process for preparing and preserving frozen potatoes, typically for french fries and hash brown products.
  • the patent was reissued as Re. 23,890. Cut potatoes are steamed blanched, partially dehydrated to contain 10-15% less moisture than untreated potatoes, chilled, and frozen. Dehydration is performed with an air cooler and heat is not applied during the dehydration step.
  • potato crisps were prepared.
  • the potatoes were washed thoroughly and hand peeled using stainless steel peelers.
  • An automatic electric slicer was used to slice the potatoes to a uniform thickness of less than 1 mm.
  • Crisps were prepared immediately by dipping the slices for two minutes in a thermostatic fryer using sunflower oil at 180 °C (356 °F).
  • One lot of potatoes was processed into dehydrated slices. The time required to denature the enzymes was determined by a blanching test The slices made from fresh peeled potatoes were blanched in boiling water for four minutes.
  • the blanched slices were then sulfited in an aqueous solution.
  • the drained slices were dehydrated in a hot air cabinet dryer at 60 °C (140 °F) until the moisture content of the slices fell to less than 10%.
  • the drying ratio and yield of dry product were recorded.
  • the dehydrated slices were stored in high-density polyethylene bags until used.
  • Crisps were prepared by frying the dehydrated slices using the flying conditions mentioned earlier.
  • the rehydration of dehydrated slices was carried out by soaking the dehydrated slices in water at room temperature and also in boiling water with and without 1 - 25% salt The amount of water absorbed by the slices was recorded after intervals of 3, 5, 7, and 10 minutes. The rehydrated slices were fried under the standard conditions. Their quality was compared with that of crisps made from dehydrated slices and fresh slices.
  • the strips have a width and a thickness from about 6.35 mm to about 12.7 mm and are several inches in length.
  • the strips are washed to remove the surface starch and then the strips are blanched by emersion in hot water in the range from about 87 °C to 115 °C (about 160 °F to 210 °F) for 2 to 15 minutes, or with a temperature range of from about 71 °C (170 °F) to about 88 °C (190 °F) for 4 to 10 minutes being preferred.
  • the crispness and rigidity of the finished fried potato strips are improved by contacting the blanched strips, before partying, with an aqueous solution containing a hydrolyzed starch product.
  • the potato strips After contact with the aqueous solution the potato strips are drained and preferably partially dehydrated to reduce their moisture content.
  • the potato strips are subjected to heated air having a temperature in the range of from about 65 °C (150 °F) to about 175 °C (350 °F) for from about 5 to 20 minutes in order to reduce the moisture content of the strips to the point at which the strips have lost about 5% to 25% of their initial weight
  • the partially dehydrated strips are then parfried by immersing them in a deep fat fryer for a short period of time, for example, 20 to 90 seconds at a fat temperature in the range of from about 162 °C (325 °F) to about 200 °C (390 °F).
  • Parfrying removes additional moisture from the strips so that upon completion of parfrying, the potato strips have solids content of between 30%-40% which is equivalent to approximately 60% - 70% moisture.
  • the potato strips are frozen, packaged, and shipped or stored for subsequent use.
  • To prepare the parfried strips for consumption they are finish fried in deep fat or oil bath at a temperature in the range of from about 150 °C (300 °F) to about 190 °C (375 °F) for 1.5 to 3.5 minutes to develop color and crispness.
  • the raw potato slice after being washed, is dipped in a chemical solution for 3 to 5 minutes and is then rapidly frozen at -40 °C (-40 °F) for 5 to 30 minutes.
  • the raw potato slices used in this process are chemically treated before being frozen.
  • the raw potato slice is then stored at approximately -20 °C (-4 °F) and, in the second stage, is then thawed at 30 °C to 80 °C (86 °F to 176 °F).
  • the potato chip is then prepared by frying the potato at 170 °C to 190 °C (338 °F to 374 °F) for 1.5 minutes.
  • the potatoes are simply peeled, washed, sliced, and are then frozen raw. Immediately after freezing, the frozen slices were immersed in warm water at a temperature between about 32 °C and about 49 °C (90 °F and 120 °F) for from 1 to 3 minutes sufficient to thaw the potatoes. After thawing, the slices were then fried.
  • the disclosure does not concern itself with preparing potatoes for long-term storage before being prepared for commercial use.
  • U.S. Pat No. 4,254,153 concerns a two-stage potato processing system which requires two drying steps and a blanching step -- the product is then parfried and frozen.
  • U.S. Pat No. 4,632,838 also relates to a two-stage potato chip process in which there is a chemical treatment of the potato slices, then blanching, then a drying step, and then two parfry steps before freezing.
  • the initial stage would be continuous and would include washing, peeling, paring and trimming, slicing, washing, reducing the chips to a specific half-product moisture, and then freezing the product.
  • the frozen product can then be stored in a cold warehouse for extended periods of time, up to several months.
  • the frozen product is finish fried to a required moisture level, seasoned and bagged for distribution.
  • the potential advantages of such a process are in reduced freight costs of potatoes, reduced water and sewage costs, ability to convert waste products into high value by-products, and to provide consistent feedstock to the finishing fryer to produce high-quality finished products all year round.
  • the expensive equipment used during the first stage could be located at one site near the potato source.
  • the second stage apparatus is less expensive and can be situated at a number of sites where the finished chips are fried, salted, and bagged for distribution to commercial sources. Thus, equipment costs would be substantially reduced.
  • the potatoes are sliced to a desired thickness, washed to remove surface starch, fried to reduce the moisture content to an amount in the range of 3% to 30%, frozen, and then stored until ready for use.
  • the frozen potato slices are transported to remote sites where a second stage continuous process prepares the potato slices for commercial use by finish frying the frozen potato slices to form potato chips, seasoning, and bagging the potato chips for consumer use.
  • the potatoes are again sliced to a desired thickness, washed to remove surface starch, blanched to deactivate enzymes in the potato slices, dried to reduce the moisture content to an amount in the range of 25% to 74% (with a preferred range of 25% to 35%), frozen, and then stored until ready for use.
  • the present invention relates to a dual-stage process for preparing potato chips comprising the steps of centralizing a first stage continuous process for preparing potato slices for indefinite storage and having a second stage process for preparing the stored potato slices into potato chips for a consumer.
  • the potatoes are peeled and sliced to a thickness in the range of from 1.3 mm to about 2.8 mm. The potato slices are then washed to remove surface starch thereon.
  • the washed potato slices are fried at a temperature in the range of from about 171 °C to 182 °C (about 340 °F to about 360 °F) for a time period in the range of 50 to 180 seconds to reduce the moisture content of the potato slices to an amount in the range of 3% to 30%, preferably 5% to 15%.
  • the potato slices are then frozen for a time period in the range of 1 to 6 minutes at a temperature in the range of about -10 °C to -30 °C (about 14 °F to -22 °F). After freezing, the frozen potato slices are stored at a temperature of -18 °C (0 °F) for an extended period of time up to several months.
  • the present invention comprises the steps of centralizing a first stage continuous process for preparing potato slices for indefinite storage and having a second stage process for preparing the stored potato slices into potato chips for a consumer.
  • the potatoes are peeled and sliced to a thickness in the range of 1.3 mm to 2.8 mm.
  • the slices are then blanched to deactivate the enzymes. If steam is used, the blanching process is carried out for 2 to 50 seconds at a temperature of about 121 °C to about 138 °C (about 250 °F to about 280 °F).
  • the preferred temperature of steam is 121 °C (250 °F) with the preferred water temperature of 82 °C (182 °F).
  • the process is carried out for 2 to 4 minutes at a temperature range of about 71 °C to about 88 °C (160 °F to about 190 °F).
  • the blanched potato slices are dried at a temperature in the range of about 121 °C to about 135 °C (about 250 °F to about 275 °F) for a period of 2 to 12 minutes to reduce the moisture content of the potato slices to an amount in the range of 25% to 74%.
  • the potato slices are then frozen for a time period in the range of 1 to 6 minutes at a temperature in the range of about -10 °C to -30 °C (about 14 °F to -22 °F). After freezing, the frozen potato slices are stored at a temperature in the range of about -18 °C (0 °F) for an extended period of time.
  • the frozen potato slices are shipped to a plurality of locations where they are fried for a time period in the range of about 15 to 45 seconds at a temperature in the range of about 160 °C to about 179 °C (about 320 °F to about 355 °F) to form potato chips with moisture varying from 1.1% to 1.6%. They are then bagged for consumer use.
  • FIG. 1 the preferred embodiments shown in FIG. 1 which relate to frying the raw potato slices.
  • the potato varieties used are those normally used for potato chips such as Snowden or Atlantic. They typically have solids in the range of 15.0% to 22.0% and are under 5 inches in diameter.
  • the potatoes are peeled in a typical manner by abrasive peeling to remove at least 85% of the peel.
  • a continuous roller type peeler well known in the art, may be used.
  • the potatoes are sliced to a substantially uniform thickness in the range of 1.3 mm to 2.8 mm.
  • An Urschel Model CC slicer well known in the art, may be used. The slices are then washed in a well-known manner to remove the surface starch thereon. In this process, the slices do not have to be blanched to deactivate enzymes.
  • the potato slices are fried at a temperature in the range of about 171 °C to about 182 °C (about 340 °F to about 360 °F), with the preferred range being about 174 °C to 179 °C (about 345 °F to about 355 °F), for a time period in the range of about 50 to 180 seconds, with the preferred range being from about 70 to 90 seconds to reduce the moisture content of the potato slices to an amount in the range of 3% to 30% and preferably to about 10% to 15%.
  • a typical continuous-type fryer well known in the art may be used.
  • the potato slices are quick frozen for a time period in the range of about 1 to 6 minutes in a temperature range of from about -10 °C to -30 °C (about 14 °F to -22 °F).
  • the potato slices may be slowly frozen for a time period of 20 to 60 minutes, with the preferred time being 50 minutes, at about 0 °to -18 °C (about 32 °F to 0 °F).
  • the frozen potato slices are then stored at a temperature of -18 °C (0 °F) for an extended period of time up to several months.
  • FIG. 2 illustrates the addition of an optional step to the first stage process illustrated in FIG. 1.
  • a low oil chipper (LOC) 22 a well-known device, is inserted after the frying stage 16 to reduce oil spotting and oil content in the finished fried product. It operates with the following conditions: 30% steam, 5% oxygen, and 40 seconds of dwell time at a temperature in the range of about 88 °C to about 124 °C (about 190 °F to about 255 °F).
  • the potato slices are then frozen at step 18 as previously indicated in relation to FIG. 1.
  • FIG. 3 illustrates yet another optional step in the process of FIG. 1 wherein the step of tempering the potato slices at step 24 is inserted before the freeze step 18 and the packaging/storing step 20.
  • the fried potato slices after step 16 at step 24 are tempered for a time period in the range of about 1 to 60 minutes at room temperature to assist in causing uniform moisture distribution in the fried potato slice.
  • moisture is removed from the outer surface areas first, with the highest moisture levels remaining in the center of the slices. As the slices spend more time in the fryer, further moisture diffuses from the slice center to the outer surfaces of the slice. If the potato slice is tempered, allowed to sit after frying, the remaining moisture tends to be equilibrated throughout the fried slice.
  • After the tempered potato slices are frozen, packaged, and stored, they may, at any time up to several months, be shipped at step 26 from the central location where they are stored to any one of a plurality of sites at remote locations for finish frying of the product during the second stage.
  • the first three steps in the alternate process shown in FIG. 4 are identical to steps 10, 12, and 14 of the process of the preferred embodiment.
  • the potatoes typically used are the Snowden or Atlantic variety having solids in the range of from about 15.0% to about 22% and are under 5 inches in diameter.
  • the potatoes are peeled in a typical manner and, again, are sliced in a well-known manner to a substantially uniform thickness in the range of from 1.3 mm to about 2.8 mm.
  • the slices are then washed in a well-known manner to remove the surface starch thereon.
  • the enzymes must be and are deactivated to reduce browning of the potato slices. Either steam blanching or water blanching can be used.
  • the raw potato slices are steamed at a temperature in the range from about 120 °C to about 138 °C (about 250 °F to about 280 °F) for a time period in the range of from about 2 to 50 seconds.
  • the preferred temperature of the steam is 121 °C (250 °F).
  • the raw potato slices are placed in water having a temperature in the range of from about 71 °C to about 88 °C (about 160 °F to about 190 °F) for a time period in the range of about 2 minutes to about 4 minutes.
  • the preferred water temperature is about 82 °C (180 °F). It is important that the blanching water not be boiling water as in such case nutrients are removed from the raw potato slices.
  • the raw blanched potato slices are then dried with heated air in the temperature range of from about 121 °C to about 135 °C (about 250 °F to about 275 °F) for a time period in the range of from about 2 to 12 minutes to reduce the moisture content of the potato slices to an amount in the range of 25% to about 74%.
  • the partially dried potato slices are then frozen and stored as explained previously.
  • FIG. 5 illustrates the steps of the second stage in which, once again, the frozen potato slices may be allowed to temper at step 28. This, again, allows equilibration of the moisture throughout the potato slice. They are then fed on a conventional feed conveyor 30 as a monolayer into the fryer 32 where they are fried for a time period in the range of 15 to 45 seconds at a temperature in the range of about 160 °C to 179 °C (about 320 °F to 355 °F) to form potato chips having a moisture content in the range of from about 1.1% to 1.6%. They are then salted or seasoned at step 34 in the usual manner and packaged at step 36 in a well-known manner for consumer use.
  • chipping potatoes used for potato chips are low in reducing sugars and are generally not used for french fries or baked potatoes.
  • the common varieties of chipping potatoes are Atlantic, Monona, Norchip, Snowden, and other proprietary varieties grown for exclusive use of the potato chip manufacturer.
  • the initial stage involves partially frying slices to 3% to 30% moisture (or alternatively, partially drying the potato slices as set forth earlier), and then freezing this product in the range of from about -10 °C to -30 °C (about 14 °F to -22 °F).
  • the frozen product is then stored in a cold warehouse for extended periods of time.
  • the frozen product is finish fried to a desired moisture content.
  • a large central location situated near the potato fields can be utilized to produce the initial half product during the first stage of the continuous process and the resulting potato slice is stored for later distribution to a number of finishing plants where, during the second stage of the continuous process, the potato chips can be finished and bagged.
  • this process provides consistent feedstock to the finishing fryer to produce high-quality finished products all year-round.

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Claims (25)

  1. Procédé continu pour préparer des tranches de pommes de terre pour le stockage jusqu'à ce qu'elles soient prêtes pour la friture finale, le procédé comprenant les étapes de:
    découpage en tranches des pommes de terres épluchées, à une épaisseur allant de 1,3 millimètres jusqu'à 2,8 millimètres;
    lavage desdites tranches de pommes de terre afin d'en enlever la couche d'amidon ;
    friture desdites tranches de pommes de terre lavées pour une période de temps ;
    congélation desdites tranches de pommes de terre; et
    stockage desdites tranches de pommes de terre jusqu'à ce qu'elles soient prêtes pour la friture finale ;
    dans lequel
    durant la période de temps de friture précitée, la teneur en humidité est réduite à une valeur allant de 3 % à 30 %, afin que lesdites tranches de pommes de terre soient aptes à former des chips de pommes de terre frites et emballées après stockage.
  2. Procédé en deux étapes pour préparer des tranches de pommes de terre frites comprenant :
    un procédé continu en première étape tel que décrit en revendication 1 ;
    et
    un procédé continu en seconde étape pour préparer des tranches de pommes de terre frites pour leur utilisation par un consommateur comprenant les étapes de:
    expédition desdites tranches de pommes de terre congelées vers une pluralité d'emplacements ;
    friture desdites tranches de pommes de terre congelées à chacun de la pluralité d'emplacements pour une période de temps suffisante pour former des chips ;
    et emballage desdites chips pour leur utilisation par un consommateur.
  3. Procédé tel que décrit en revendication 2, incluant par ailleurs l'étape de la friture desdites tranches de pommes de terre congelées, durant ledit procédé continu en seconde étape, à chacun de la pluralité des emplacements à une température allant de 160°C jusqu'à 179°C (320°F à 355°F), pour une période de temps allant de 15 à 45 secondes pour atteindre un niveau d'humidité allant de 1,1 % à 1,6 %.
  4. Procédé tel que décrit en revendication 1, incluant par ailleurs l'étape de la friture desdites tranches de pommes de terre lavées à une température allant de 171°C à 182°C (340°F à 360°F).
  5. Procédé tel que décrit en revendication 4, dans lequel la température pour la friture desdites tranches de pommes de terre va de 174°C à 179°C (345°F à 355°F).
  6. Un procédé tel que décrit en revendication 4, dans lequel lesdites tranches de pommes de terre lavées sont frites pour une période de temps allant de 50 à 180 secondes à ladite température.
  7. Procédé tel que décrit en revendication 6, dans lequel la période de temps pour la friture desdites tranches de pommes de terre va de 70 à 90 secondes.
  8. Procédé tel que décrit en revendication 1, incluant par ailleurs l'étape de laisser reposer lesdites tranches de pommes de terre frites avant la congélation pour une période de temps allant de 1 à 60 minutes à température ambiante pour provoquer une distribution d'humidité uniforme dans la tranche de pommes de terre frite.
  9. Procédé tel que décrit en revendication 1, incluant par ailleurs l'étape de la congélation desdites tranches de pommes de terre pour une période de temps allant de 1 à 6 minutes à une température allant de -10°C à -30°C (14°F à -22°F).
  10. Procédé tel que décrit en revendication 1, incluant par ailleurs l'étape du stockage desdites tranches de pommes de terre congelées à une température d'environ -18°C (0°F).
  11. Procédé tel que décrit en revendication 1, incluant par ailleurs l'étape de la congélation lente desdites tranches de pommes de terre pour une période de temps allant de 20 à 60 minutes à une température allant de 0°C à - 18°C (32°F à 0°F).
  12. Procédé tel que décrit en revendication 11, dans lequel le temps pour la congélation lente desdites tranches de pommes de terre est de 50 minutes à 0°C jusqu'à -18°C (32°F à 0°F).
  13. Procédé selon la revendication 9 dans lequel lesdites tranches de pommes de terre sont frites afin de réduire la teneur en humidité à une valeur de 5 %-15 %
  14. Procédé continu pour préparer des morceaux de pommes de terre pour un stockage indéfini comprenant les étapes de :
    découpage en tranches des pommes de terre épluchées en morceaux ;
    lavage desdits morceaux de pommes de terre pour en enlever la couche d'amidon ;
    désactivation des enzymes dans lesdits morceaux de pommes de terre;
    séchage desdits morceaux de pommes de terre avec de l'air chaud pour une période de temps jusqu'à ce que les morceaux aient une teneur en humidité allant de 25 % à 74 % ;
    congélation desdits morceaux de pommes de terre; et
    stockage desdits morceaux de pommes de terre congelés jusqu'à ce qu'ils soient prêts pour leur utilisation ;
    dans lequel
    dans ladite étape du découpage en tranches, lesdites pommes de terre sont découpées en tranche de manière que lesdits morceaux de pommes de terre forment des tranches de pommes de terre avec une épaisseur allant de 1,3 millimètres à 2,8 millimètres, de telle manière que lesdites tranches de pommes de terre soient aptes à former des chips de pommes de terre frites et emballées après stockage.
  15. Procédé en deux étapes pour préparer des morceaux de pommes de terre frits comprenant:
    un procédé continu en première étape tel que décrit en revendication 14 ;
    et
    un procédé continu en seconde étape pour préparer des morceaux de pommes de terre frits à n'importe lequel d'une pluralité d'emplacements comprenant les étapes de :
       friture finale desdits morceaux de pommes de terre congelés à chacun de la pluralité d'emplacements pour une période de temps suffisante pour former des chips de pommes de terre ; et emballage desdites chips pour leur utilisation par un consommateur.
  16. Procédé tel que décrit en revendication 14, dans lequel l'étape du séchage desdites tranches de pommes de terre inclut le séchage desdites tranches de pommes de terre jusqu'à ce que les tranches aient une teneur en humidité ayant une valeur allant de 25 % à 35 %.
  17. Procédé tel que décrit en revendication 14, dans lequel lesdites tranches de pommes de terre sont séchées avec de l'air chaud à une température allant de 121°C à 135°C (250°F à 275°F).
  18. Procédé tel que décrit en revendication 17, dans lequel lesdites tranches de pommes de terre sont séchées pendant une période de temps allant de 2 à 12 minutes.
  19. Procédé tel que décrit en revendication 14, dans lequel l'étape de désactivation des enzymes dans lesdites tranches de pommes de terre comprend par ailleurs l'étape du blanchiment desdites tranches de pommes de terre lavées avec de la vapeur pendant une période de temps allant de 2 à 50 secondes à une température allant de 121°C à 138°C (250°F à 280°F).
  20. Procédé tel que décrit en revendication 19, dans lequel la température pour blanchir lesdites tranches de pommes de terre lavées avec de la vapeur est de 121°C environ (250°F).
  21. Procédé tel que décrit en revendication 14, dans lequel l'étape de désactivation des enzymes dans lesdites tranches de pommes de terre comprend par ailleurs l'étape du blanchiment desdites tranches de pommes de terre lavées avec de l'eau pour une période de temps de 2 à 4 minutes à une température allant de 71°C à 88°C (160°F à 190°F).
  22. Procédé tel que décrit en revendication 21, dans lequel la température pour blanchir lesdites tranches de pommes de terre lavées avec de l'eau est de 82°C environ (180°F).
  23. Procédé tel que décrit en revendication 14, dans lequel l'étape de la congélation desdites tranches séchées comprend par ailleurs l'étape de la congélation rapide desdites tranches de pommes de terre séchées pendant 1 à 6 minutes à une température allant de -10°C à -30°C (14°F à -22°F).
  24. Procédé tel que décrit en revendication 14, dans lequel l'étape de la congélation desdites tranches séchées comprend par ailleurs l'étape de la congélation lente desdites tranches de pommes de terre pendant 20 à 60 minutes à une température allant de 0°C à -18°C (32°F à 0°F).
  25. Procédé tel que décrit en revendication 24 dans lequel le temps pour la congélation lente desdites tranches est de 50 minutes pour passer de 0°C jusqu'à -18°C (32°F à 0°F).
EP96200848A 1995-04-07 1996-04-02 Procédé de fabrication de chips de pomme de terre, en deux étapes Expired - Lifetime EP0736261B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US418306 1995-04-07
US08/418,306 US5589213A (en) 1995-04-07 1995-04-07 Dual-stage process for manufacturing potato chips

Publications (3)

Publication Number Publication Date
EP0736261A2 EP0736261A2 (fr) 1996-10-09
EP0736261A3 EP0736261A3 (fr) 1997-11-19
EP0736261B1 true EP0736261B1 (fr) 2001-11-21

Family

ID=23657568

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Application Number Title Priority Date Filing Date
EP96200848A Expired - Lifetime EP0736261B1 (fr) 1995-04-07 1996-04-02 Procédé de fabrication de chips de pomme de terre, en deux étapes

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US (1) US5589213A (fr)
EP (1) EP0736261B1 (fr)
AT (1) ATE209003T1 (fr)
DE (1) DE69617076T2 (fr)
DK (1) DK0736261T3 (fr)
ES (1) ES2168433T3 (fr)
PT (1) PT736261E (fr)

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US7393550B2 (en) * 2003-02-21 2008-07-01 Frito-Lay North America, Inv. Method for reducing acrylamide formation in thermally processed foods
US7811618B2 (en) 2002-09-19 2010-10-12 Frito-Lay North America, Inc. Method for reducing asparagine in food products
US8110240B2 (en) 2003-02-21 2012-02-07 Frito-Lay North America, Inc. Method for reducing acrylamide formation in thermally processed foods
US20080175960A1 (en) * 2007-01-18 2008-07-24 Griffith Laboratories International, Inc. Coating for adhering food substrate particulates
US8486684B2 (en) 2007-08-13 2013-07-16 Frito-Lay North America, Inc. Method for increasing asparaginase activity in a solution
US8284248B2 (en) 2009-08-25 2012-10-09 Frito-Lay North America, Inc. Method for real time detection of defects in a food product
US8158175B2 (en) 2008-08-28 2012-04-17 Frito-Lay North America, Inc. Method for real time measurement of acrylamide in a food product
US9095145B2 (en) 2008-09-05 2015-08-04 Frito-Lay North America, Inc. Method and system for the direct injection of asparaginase into a food process
US9215886B2 (en) 2008-12-05 2015-12-22 Frito-Lay North America, Inc. Method for making a low-acrylamide content snack with desired organoleptical properties
CN114732129A (zh) * 2022-03-21 2022-07-12 郝占宁 一种具有减肥功能的保健食品及其制备方法

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Also Published As

Publication number Publication date
EP0736261A2 (fr) 1996-10-09
DK0736261T3 (da) 2002-05-21
ES2168433T3 (es) 2002-06-16
ATE209003T1 (de) 2001-12-15
PT736261E (pt) 2002-04-29
US5589213A (en) 1996-12-31
DE69617076T2 (de) 2002-04-11
EP0736261A3 (fr) 1997-11-19
DE69617076D1 (de) 2002-01-03

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